br: refine cmd stream restore to restore log

br/cmd/br/restore.go

@@ -83,6 +83,7 @@ func NewRestoreCommand() *cobra.Command {
 		newDBRestoreCommand(),
 		newTableRestoreCommand(),
 		newRawRestoreCommand(),
+		newStreamRestoreCommand(),
 	)
 	task.DefineRestoreFlags(command.PersistentFlags())
 
@@ -141,3 +142,17 @@ func newRawRestoreCommand() *cobra.Command {
 	task.DefineRawRestoreFlags(command)
 	return command
 }
+
+func newStreamRestoreCommand() *cobra.Command {
+	command := &cobra.Command{
+		Use:   "log",
+		Short: "restore log backups",
+		Args:  cobra.NoArgs,
+		RunE: func(command *cobra.Command, _ []string) error {
+			return runRestoreCommand(command, task.LogRestoreCmd)
+		},
+	}
+	task.DefineFilterFlags(command, filterOutSysAndMemTables, false)
+	task.DefineStreamRestoreFlags(command)
+	return command
+}

br/cmd/br/stream.go

@@ -46,7 +46,6 @@ func NewStreamCommand() *cobra.Command {
 		//newStreamPauseCommand(),
 		//newStreamResumeCommand(),
 		newStreamStatusCommand(),
-		newStreamRestoreCommand(),
 		newStreamTruncateCommand(),
 	)
 
@@ -127,23 +126,6 @@ func newStreamStatusCommand() *cobra.Command {
 	return command
 }
 
-// TODO maybe we should use `br restore stream` rather than `br stream restore`
-// because the restore and stream task has no common flags.
-func newStreamRestoreCommand() *cobra.Command {
-	command := &cobra.Command{
-		Use:   "restore",
-		Short: "restore a stream backups",
-		Args:  cobra.NoArgs,
-		RunE: func(command *cobra.Command, _ []string) error {
-			return streamCommand(command, task.StreamRestore)
-		},
-	}
-	task.DefineRestoreFlags(command.PersistentFlags())
-	task.DefineFilterFlags(command, filterOutSysAndMemTables, false)
-	task.DefineStreamRestoreFlags(command.Flags())
-	return command
-}
-
 func newStreamTruncateCommand() *cobra.Command {
 	command := &cobra.Command{
 		Use:   "truncate",
@@ -172,13 +154,6 @@ func streamCommand(command *cobra.Command, cmdName string) error {
 	}
 
 	switch cmdName {
-	case task.StreamRestore:
-		if err = cfg.RestoreConfig.ParseFromFlags(command.Flags()); err != nil {
-			return errors.Trace(err)
-		}
-		if err = cfg.ParseStreamRestoreFromFlags(command.Flags()); err != nil {
-			return errors.Trace(err)
-		}
 	case task.StreamTruncate:
 		if err = cfg.ParseStreamTruncateFromFlags(command.Flags()); err != nil {
 			return errors.Trace(err)

br/pkg/conn/conn.go

@@ -24,6 +24,7 @@ import (
 	"github.com/pingcap/tidb/br/pkg/version"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/kv"
+	"github.com/tikv/client-go/v2/oracle"
 	"github.com/tikv/client-go/v2/tikv"
 	"github.com/tikv/client-go/v2/txnkv/txnlock"
 	pd "github.com/tikv/pd/client"
@@ -446,3 +447,13 @@ func (mgr *Mgr) Close() {
 
 	mgr.PdController.Close()
 }
+
+// GetTS gets current ts from pd.
+func (mgr *Mgr) GetTS(ctx context.Context) (uint64, error) {
+	p, l, err := mgr.GetPDClient().GetTS(ctx)
+	if err != nil {
+		return 0, errors.Trace(err)
+	}
+
+	return oracle.ComposeTS(p, l), nil
+}

br/pkg/restore/client.go

@@ -126,9 +126,9 @@ type Client struct {
 	// restoreTs is used for kv file restore.
 	// TiKV will filter the key space larger than this ts.
 	restoreTs uint64
-	// currentTS is used for rewrite meta kv when restore stream.
+	// currentTs is used for rewrite meta kv when restore stream.
 	// Can not use `restoreTS` directly, because schema created in `full backup` maybe is new than `restoreTS`.
-	currentTS uint64
+	currentTs uint64
 
 	storage storage.ExternalStorage
 }
@@ -278,7 +278,7 @@ func (rc *Client) SetRestoreTs(ts uint64) {
 }
 
 func (rc *Client) SetCurrentTS(ts uint64) {
-	rc.currentTS = ts
+	rc.currentTs = ts
 }
 
 func (rc *Client) SetStorage(ctx context.Context, backend *backuppb.StorageBackend, opts *storage.ExternalStorageOptions) error {
@@ -1728,7 +1728,7 @@ func (rc *Client) InitSchemasReplaceForDDL(
 		}()...)
 	}
 
-	return stream.NewSchemasReplace(dbMap, rc.currentTS, tableFilter, rc.GenGlobalID, rc.GenGlobalIDs), nil
+	return stream.NewSchemasReplace(dbMap, rc.currentTs, tableFilter, rc.GenGlobalID, rc.GenGlobalIDs), nil
 }
 
 // RestoreMetaKVFiles tries to restore files about meta kv-event from stream-backup.

br/pkg/task/restore.go

@@ -4,6 +4,7 @@ package task
 
 import (
 	"context"
+	"github.com/spf13/cobra"
 	"time"
 
 	"github.com/opentracing/opentracing-go"
@@ -44,6 +45,11 @@ const (
 	// current only support STRICT or IGNORE, the default is STRICT according to tidb.
 	FlagWithPlacementPolicy = "with-tidb-placement-mode"
 
+	// FlagStreamRestoreTS is used for log restore.
+	FlagStreamRestoreTS = "restore-ts"
+	// FlagStreamFullBackupStorage is used for log restore, represents the full backup storage.
+	FlagStreamFullBackupStorage = "full-backup-storage"
+
 	defaultRestoreConcurrency = 128
 	maxRestoreBatchSizeLimit  = 10240
 	defaultPDConcurrency      = 1
@@ -55,6 +61,7 @@ const (
 	FullRestoreCmd  = "Full Restore"
 	DBRestoreCmd    = "DataBase Restore"
 	TableRestoreCmd = "Table Restore"
+	LogRestoreCmd   = "Log Restore"
 	RawRestoreCmd   = "Raw Restore"
 )
 
@@ -132,6 +139,12 @@ type RestoreConfig struct {
 	DdlBatchSize uint `json:"ddl-batch-size" toml:"ddl-batch-size"`
 
 	WithPlacementPolicy string `json:"with-tidb-placement-mode" toml:"with-tidb-placement-mode"`
+
+	// FullBackupStorage is used to find the maps between table name and table id during restoration.
+	// if not specified. we cannot apply kv directly.
+	FullBackupStorage string `json:"full-backup-storage" toml:"full-backup-storage"`
+
+	RestoreTS uint64 `json:"restore-ts" toml:"restore-ts"`
 }
 
 // DefineRestoreFlags defines common flags for the restore tidb command.
@@ -144,6 +157,14 @@ func DefineRestoreFlags(flags *pflag.FlagSet) {
 	DefineRestoreCommonFlags(flags)
 }
 
+// DefineStreamRestoreFlags defines for the restore log command.
+func DefineStreamRestoreFlags(command *cobra.Command)  {
+	command.Flags().String(FlagStreamRestoreTS, "", "the point of restore, used for log restore.\n"+
+		"support TSO or datetime, e.g. '400036290571534337' or '2018-05-11 01:42:23'")
+	command.Flags().String(FlagStreamFullBackupStorage, "", "specify the backup full storage. "+
+		"fill it if want restore full backup before restore log.")
+}
+
 // ParseFromFlags parses the restore-related flags from the flag set.
 func (cfg *RestoreConfig) ParseFromFlags(flags *pflag.FlagSet) error {
 	var err error
@@ -180,6 +201,16 @@ func (cfg *RestoreConfig) ParseFromFlags(flags *pflag.FlagSet) error {
 	if err != nil {
 		return errors.Annotatef(err, "failed to get flag %s", FlagWithPlacementPolicy)
 	}
+	tsString, err := flags.GetString(FlagStreamRestoreTS)
+	if err != nil {
+		return errors.Trace(err)
+	}
+	if cfg.RestoreTS, err = ParseTSString(tsString); err != nil {
+		return errors.Trace(err)
+	}
+	if cfg.FullBackupStorage, err = flags.GetString(FlagStreamFullBackupStorage); err != nil {
+		return errors.Trace(err)
+	}
 	return nil
 }
 
@@ -208,6 +239,12 @@ func (cfg *RestoreConfig) adjustRestoreConfig() {
 	}
 }
 
+func (cfg *RestoreConfig) adjustRestoreConfigForStreamRestore() {
+	if cfg.Config.Concurrency == 0 {
+		cfg.Config.Concurrency = 32
+	}
+}
+
 func configureRestoreClient(ctx context.Context, client *restore.Client, cfg *RestoreConfig) error {
 	client.SetRateLimit(cfg.RateLimit)
 	client.SetCrypter(&cfg.CipherInfo)
@@ -269,10 +306,18 @@ func isFullRestore(cmdName string) bool {
 	return cmdName == FullRestoreCmd
 }
 
+func isStreamRestore(cmdName string) bool {
+	return cmdName == LogRestoreCmd
+}
+
 // RunRestore starts a restore task inside the current goroutine.
 func RunRestore(c context.Context, g glue.Glue, cmdName string, cfg *RestoreConfig) error {
-	cfg.adjustRestoreConfig()
+	if isStreamRestore(cmdName) {
+		cfg.adjustRestoreConfigForStreamRestore()
+		return RunStreamRestore(c, g, cmdName, cfg)
+	}
 
+	cfg.adjustRestoreConfig()
 	defer summary.Summary(cmdName)
 	ctx, cancel := context.WithCancel(c)
 	defer cancel()